Dayton AudioDS115-8
£20.18 · 69% more, worseFs55 Hz –
Qts0.38 +9%
Vas4.3 L +40%, worse
BL5.9 T·m +13%, better
Xmax4.1 mm –
Sensitivity84 dB +1.2
- Fs
- 54Hz
- Xmax
- 4mm
- SPL
- 83dB
- Pe
- 40W
- BL
- 5.2T·m
- Vd
- 20cm³
- Qts
- 0.35
- Vas
- 3L
Manufacturer response and impedance data, with source and trace details below. The left and right arrow keys read every shown curve at a frequency, a twelfth of an octave at a time, or an octave with Shift. Escape clears the reading.
Curve provenanceInspect 3 traces
These plotted lines are Bits digitizations of manufacturer evidence, not new measurements. How provenance works
- Trace datasheet-response-trace-poc/v1
30 degrees
Frequency response
222 plotted pointsMedium confidence1,456 selected pixels of 1,789 - Trace datasheet-response-trace-poc/v1
45 degrees
Frequency response
240 plotted pointsMedium confidence1,843 selected pixels of 2,368 - Trace datasheet-response-trace-poc/v1
on-axis
Frequency response
240 plotted pointsMedium confidence4,477 selected pixels of 4,477
Dayton Audio TCP115-4 is a 4-inch 4 ohm LF driver rated at 40 W RMS. The validated T/S data includes Fs 54 Hz, Qts 0.35, Vas 3.1 L, Xmax 4 mm, sensitivity 82.8 dB, plus 20 cm³ Vd and 134 EBP. bits tracks UK, EU and US shop prices, price movement, datasheet links, simulator import data, and similar drivers, with a current best price of £11.95.
The published T/S values agree with each other
Thiele/Small
- Fs
- 54Hz
- Qts
- 0.35
- Qes
- 0.40
- Qms
- 3.1
- Vas
- 3.1L
- Re
- 3.2Ω
- Le
- 0.97mH
Motor and cone
- BL
- 5.2T·m
- Sd
- 50cm²
- Mms
- 10g
- Xmax
- 4mm
- Vd †
- 20cm³
Power and response
- Sensitivity †
- 82.8dB
- Manufacturer sensitivity
- 86.8dB
- Power
- 40W
- Impedance
- 4Ω
- Low limit
- 55Hz
- High limit
- 5Hz
- EBP †
- 134 · Leans vented
Size and mounting
- Diameter
- 116.1mm
- Cutout
- 93.0mm
- Depth
- 65.0mm
Other published values
- Cms
- 0.88mm/N
- Power Peak
- 80
Sensitivity shows 82.8 dB, calculated from the T/S values. Dayton Audio publishes 86.8 dB, 4.0 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else Dayton Audio lists
LF · Primary · 4″
- BL
- 5.2T·m
- Fs
- 54Hz
- Le
- 0.97mH
- Re
- 3.2Ω
- Sd
- 50cm²
- Cms
- 0.88mm/N
- Mms
- 10g
- Qes
- 0.40
- Qms
- 3.1
- Qts
- 0.35
- SPL
- 82.8dB
- Vas
- 3.1L
- Xmax
- 4mm
- Power
- 40W
- Impedance
- 4Ω
- Power Peak
- 80
- Sensitivity
- 86.8dB
- Low limit
- 55Hz
- Calculated sensitivity †
- 82.8dB
- High limit
- 5Hz
- Manufacturer sensitivity
- 86.8dB
- Diameter
- 116.1mm
- Depth
- 65.0mm
- Cutout
- 93.0mm
02
Compare
Same-size drivers, compared with the TCP115-4. Clear differences are green when better and red when worse.
This driverTCP115-4
Best price
£11.95
Fs
54 Hz
Qts
0.35
Vas
3.1 L
BL
5.2 T·m
Xmax
4 mm
Sensitivity
82.8 dB
Power
40 W
Dayton AudioSIG120-4
£24.67 · 106% more, worseFs75 Hz +39%, worse
Qts0.43 +23%, worse
Vas3.1 L –
BL5 T·m −4%
Xmax4 mm –
Sensitivity86.4 dB +3.6, better
CIAREHW100
£27.63 · 131% more, worseFs70 Hz +30%, worse
Qts0.31 −11%, better
Vas4.3 L +39%, worse
BL5.6 T·m +8%
Xmax4.3 mm +7%
Sensitivity88 dB +5.2, better
FaitalPRO4FE42
£29.42 · 146% more, worseFs110 Hz +104%, worse
Qts0.38 +9%
Vas1.8 L −42%, better
BL5.4 T·m +4%
Xmax2.8 mm −29%, worse
Sensitivity89.8 dB +7, better
Dayton AudioRS125-8
£37.39 · 213% more, worseFs59 Hz +10%, worse
Qts0.34 –
Vas4.8 L +54%, worse
BL5.7 T·m +9%
Xmax4 mm –
Sensitivity85.8 dB +3, better
CIAREPWA5.38
£37.58 · 214% more, worseFs78 Hz +45%, worse
Qts0.37 +6%
Vas4.5 L +45%, worse
BL8.9 T·m +71%, better
Xmax3.9 mm –
Sensitivity89.2 dB +6.4, better
WavecorWF118WA07
£47.13 · 294% more, worseFs56 Hz +4%
Qts0.36 –
Vas4.9 L +58%, worse
BL4.5 T·m −13%, worse
Xmax4 mm –
Sensitivity85.6 dB +2.8, better
Tang BandW4-1320SIF
£57.77 · 383% more, worseFs75 Hz +39%, worse
Qts0.36 –
Vas5.2 L +69%, worse
BL5.3 T·m –
Xmax3 mm −25%, worse
Sensitivity89.2 dB +6.4, better
SB AcousticsSB12CACS25-8
£58.31 · 388% more, worseFs51 Hz −5%
Qts0.37 +6%
Vas6.5 L +110%, worse
BL5.2 T·m –
Xmax5 mm +25%, better
Sensitivity85.4 dB +2.6, better
Tang BandW4-1337SDF
£71.17 · 495% more, worseFs70 Hz +30%, worse
Qts0.34 –
Vas5.6 L +81%, worse
BL5.3 T·m –
Xmax2.5 mm −38%, worse
Sensitivity88.9 dB +6.1, better
WavecorWF118WA01
£76.45 · 540% more, worseFs64 Hz +19%, worse
Qts0.36 –
Vas4.3 L +39%, worse
BL4.6 T·m −12%, worse
Xmax3 mm −25%, worse
Sensitivity86.8 dB +4, better
Scanspeak10F/8424G00
£83.73 · 600% more, worseFs90 Hz +67%, worse
Qts0.37 +6%
Vas2.1 L −32%, better
BL4.8 T·m −8%
Xmax2.6 mm −35%, worse
Sensitivity87.8 dB +5, better
WavecorSW118WA01
£84.74 · 609% more, worseFs58 Hz +8%
Qts0.39 +11%, worse
Vas3.3 L +6%
BL4.7 T·m −10%
Xmax4 mm –
Sensitivity84 dB +1.2
WavecorSW118WA02
£84.74 · 609% more, worseFs60 Hz +12%, worse
Qts0.47 +34%, worse
Vas3.3 L +6%
BL5.9 T·m +13%, better
Xmax4 mm –
Sensitivity83.6 dB +0.8
£101.03 · 745% more, worse
Fs36 Hz −33%, better
Qts0.32 −9%
Vas25 L +706%, worse
BL6.3 T·m +21%, better
Xmax4 mm –
Sensitivity86.9 dB +4.1, better
WavecorWF120BD03
£120.66 · 909% more, worseFs70 Hz +30%, worse
Qts0.42 +20%, worse
Vas3.3 L +5%
BL4.5 T·m −13%, worse
Xmax4 mm –
Sensitivity85.9 dB +3.1, better
Tang BandW3-1878
£125.60 · 951% more, worseFs75 Hz +39%, worse
Qts0.28 −20%, better
Vas3.1 L –
BL4.3 T·m −17%, worse
Xmax4 mm –
Sensitivity87.9 dB +5.1, better
MorelTIW 634FT
£152.39 · 1175% more, worseFs40 Hz −26%, better
Qts0.39 +11%, worse
Vas19.7 L +535%, worse
BL5.6 T·m +8%
Xmax4.3 mm +6%
Sensitivity86.7 dB +3.9, better
£200.91 · 1581% more, worse
Fs60 Hz +12%, worse
Qts0.36 –
Vas4 L +29%, worse
BL5.5 T·m +6%
Xmax3 mm −25%, worse
Sensitivity85 dB +2.2, better
Scanspeak12M/4631G00
£242.78 · 1931% more, worseFs75 Hz +39%, worse
Qts0.33 −6%
Vas2.3 L −26%, better
BL5.3 T·m –
Xmax3 mm −25%, worse
Sensitivity86.5 dB +3.7, better
£293.02 · 2351% more, worse
Fs38 Hz −29%, better
Qts0.36 –
Vas14 L +352%, worse
BL5.5 T·m +6%
Xmax4 mm –
Sensitivity84.5 dB +1.7
WavecorWF120BD04
No current priceFs62 Hz +14%, worse
Qts0.37 +6%
Vas4.3 L +37%, worse
BL4.5 T·m −13%, worse
Xmax4 mm –
Sensitivity86 dB +3.2, better
KartesianLOM120_VMS
No current priceFs72 Hz +34%, worse
Qts0.35 –
Vas3.5 L +13%, worse
BL5.2 T·m –
Xmax4 mm –
Sensitivity90.5 dB +7.7, better
CIAREHWL100
No current priceFs70 Hz +30%, worse
Qts0.31 −11%, better
Vas4.3 L +39%, worse
BL5.6 T·m +8%
Xmax4.3 mm +7%
Sensitivity88 dB +5.2, better
KartesianCOX120_VHP
No current priceFs68 Hz +26%, worse
Qts0.34 −3%
Vas3.1 L –
BL5.9 T·m +14%, better
Xmax3.5 mm −13%, worse
Sensitivity88 dB +5.2, better
Tang BandW3-1401SD
No current priceFs75 Hz +39%, worse
Qts0.31 −11%, better
Vas1.6 L −47%, better
BL5.6 T·m +7%
Xmax3.5 mm −13%, worse
Sensitivity84.7 dB +1.9
CIARECW131
No current priceFs65 Hz +21%, worse
Qts0.39 +11%, worse
Vas5.3 L +71%, worse
BL5.7 T·m +9%
Xmax4 mm –
Sensitivity87.1 dB +4.3, better
SB AcousticsSB15BAC30-8-COAX
No current priceFs43 Hz −20%, better
Qts0.36 –
Vas17.5 L +465%, worse
BL5.3 T·m –
Xmax3 mm −25%, worse
Sensitivity87.6 dB +4.8, better
Tang BandW4-992SD
No current priceFs55 Hz –
Qts0.35 –
Vas5.7 L +85%, worse
BL6.4 T·m +24%, better
Xmax3.5 mm −13%, worse
Sensitivity85.8 dB +3, better
WavecorWF120BD12
No current priceFs57 Hz +5%
Qts0.38 +9%
Vas3.9 L +26%, worse
BL4.2 T·m −19%, worse
Xmax3 mm −25%, worse
Sensitivity84.5 dB +1.7
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
- SoundImports4.8 out of 579 ratings · Checked 26 Oct 2026Read reviews on SoundImports
- Parts Express4.8 out of 557 ratings · Checked 26 Oct 2026Read reviews on Parts Express
Each shop collects its own ratings. Bits shows them as published and doesn't verify them.
| Shop | Price | Against the lowest | Stock | Link |
|---|---|---|---|---|
Wilmslow Audio | £24.00, the lowest price | Stock not listed | Visit shop at Wilmslow Audio | |
Parts Express Import VAT and duty may apply | £11.95 | 854 in stock | Visit shop at Parts Express | |
Audiophonics Import VAT and duty may apply | £14.14 | In stock | Visit shop at Audiophonics | |
RumoH Import VAT and duty may apply | £14.15 | Out of stock | Visit shop at RumoH | |
SoundImports Import VAT and duty may apply | £14.19 | 610 in stock | Visit shop at SoundImports |
Best price over time
Tracked since 23 Jul